What is pointer in c with example

When we increment a pointer, we increase the pointer by the size of data type to which it points. The changes are made into a clone made by the called function. Pass-by-Reference with Reference Arguments does not require any clumsy syntax for referencing and dereferencing. An array name contains the address of first element of the array which acts like constant pointer. Pointers and String literals String literals are arrays containing null-terminated character sequences.

Void Pointers. Skip to content. More in Python Python Compiler. Java Core Java Tutorial. Java Type Conversion Examples. Java Wrapper Class. Java 8. Java More in Java Java Compiler. Computer Sci. Computer Architecture.

Computer Network. Database DBMS. Learn SQL. Practice SQL. More Tutorials Game Development. GO Language. Types of Pointers in C Following are the different Types of Pointers in C : Null Pointer We can create a null pointer by assigning null value during the pointer declaration.

Report a Bug. Previous Prev. Next Continue. Home Testing Expand child menu Expand. SAP Expand child menu Expand. Web Expand child menu Expand. Must Learn Expand child menu Expand. Big Data Expand child menu Expand. Live Project Expand child menu Expand. AI Expand child menu Expand. Toggle Menu Close. It is always a good practice to assign a NULL value to a pointer variable in case you do not have an exact address to be assigned.

This is done at the time of variable declaration. A pointer that is assigned NULL is called a null pointer. The NULL pointer is a constant with a value of zero defined in several standard libraries. In most of the operating systems, programs are not permitted to access memory at address 0 because that memory is reserved by the operating system. However, the memory address 0 has special significance; it signals that the pointer is not intended to point to an accessible memory location.

But by convention, if a pointer contains the null zero value, it is assumed to point to nothing. Pointers have many but easy concepts and they are very important to C programming.